24-22-00
ALL ú ú 10 Page 208 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(2)
Access Panel
118A Electrical Power Receptacle Door
C.
Procedure
S 012-143
WARNING: MAKE SURE THE EXTERNAL POWER SUPPLY OPERATES CORRECTLY BEFORE
_______ YOU SUPPLY EXTERNAL POWER TO THE AIRPLANE. IF THE EXTERNAL POWER SUPPLY HAS AN EARTH GROUNDED NEUTRAL, THERE MUST NOT BE AN OPEN OR FLOATING GROUND IN THE NEUTRAL CIRCUIT WIRING OF THE SUPPLY OR THE AIRPLANE. IF AN OPEN OR FLOATING GROUND IS PRESENT, THE AIRPLANE CAN BE PUT AT AN ELECTRICAL POTENTIAL ABOVE EARTH GROUND. THIS ELECTRICAL POTENTIAL CAN RESULT IN ELECTRIC SHOCK WITH POSSIBLE SEVERE INJURY TO PERSONNEL WHO CONTACT THE AIRPLANE. IF THE GROUND RETURN (NEUTRAL) CIRCUIT ON THE EXTERNAL POWER SUPPLY OR THE EXTERNAL POWER RECEPTACLE DOES NOT OPERATE CORRECTLY, IT IS RECOMMENDED THAT YOU STATICALLY GROUND THE AIRPLANE (AMM 20-41-01).
WARNING: MAKE SURE ALL AIRPLANE SYSTEMS THAT USE ELECTRICAL POWER ARE IN
_______ A SAFE CONDITION. AIRPLANE SYSTEMS CAN OPERATE AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
WARNING: MAKE SURE THAT THE ELECTRICAL SYSTEM IS CLEAR OF OTHER PERSONS
_______ BEFORE YOU SUPPLY POWER TO THE AIRPLANE. HIGH VOLTAGES CAN CAUSE INJURIES.
(1)
Open door 118A to get access to the external power receptacle on the P36 panel.
S 212-144
(2)
Examine the external power supply cord and the airplane external power supply receptacle before you connect the external power supply to the receptacle. If you find excessive arc erosion, corrosion and heat damage or discoloration to the pins or receptacles, repair the problems that you find (AMM 24-41-03/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 432-017
WARNING: TURN OFF THE EXTERNAL ELECTRICAL POWER SOURCE BEFORE YOU PUT
_______ THE POWER CABLES INTO THE AIRPLANE RECEPTACLES. ELECTRICAL ARCS CAN CAUSE INJURIES.
(3) Connect the power cables to the external power receptacles No. 1 (D51) and No. 2 (D52) on panel P36.
NOTE: If only one external power source is available, connect
____ the power cable to receptacle No. 1 (D51).
S 862-019
(4)
Turn the external power source on.
S 212-020
(5)
Make sure that the AC CONNECTED and POWER NOT IN USE lights on panel P36 are on.
NOTE: The ground handling bus is on, and the ground handling
____
functions will operate.
TASK 24-22-00-862-126
4. Apply External Power to the Ground Service Bus (Fig. 201)
______________________________________________
A. Access
(1)
Location Zone 118 Electrical and Electronics Compartment, RH 221 Control Cabin, LH 231 Passenger Cabin First to Second Door, LH
(2)
Access Panel
118A Electrical Power Receptacle Door
B. Procedure
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24-22-00
ALL ú ú 08 Page 210 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 012-145
WARNING:_______ MAKE SURE THE EXTERNAL POWER SUPPLY OPERATES CORRECTLY BEFORE
YOU SUPPLY EXTERNAL POWER TO THE AIRPLANE. IF THE EXTERNAL
POWER SUPPLY HAS AN EARTH GROUNDED NEUTRAL, THERE MUST NOT BE
AN OPEN OR FLOATING GROUND IN THE NEUTRAL CIRCUIT WIRING OF THE
SUPPLY OR THE AIRPLANE. IF AN OPEN OR FLOATING GROUND IS
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